Added the switch operator to Observable#259

Merged

benjchristensen merged 5 commits intoReactiveX:masterfrom

michaeldejong:operation-switch

May 16, 2013

Commits on May 5, 2013

Commits on May 6, 2013

Removed synchronized block as per RxJava guidelines (6.7).
michaeldejong
committed

Commits on May 15, 2013